package com.ny.demo;

public class Test23 {
        public String name;
        private int age ;
        public void setAge(int age ){
            if (age<0){
                System.out.println("你输入的年龄不符合规范，不能为负数");
            }
            else {
                this.age =age;
            }
        }
        public int getAge(){
            return age ;
        }
        public void play (){
            System.out.println("人类可以继续娱乐活动");
        }
    }